Definitions of Conjunction and Disjunction

[Mick O'Donnell]

Hi Chris, Jelisaveta,

   The original document describing was RST:

William C. Mann and Sandra A. Thompson 1987 "Rhetorical Structure 
Theory: A Theory of Text Organization". ISI Technical Report ISI/RS-87-190.
(available from: http://www.sfu.ca/rst/05bibliographies/report.html)

It mentions disjunction under multinuclear relations (p73). However,
from a quick look, I don't think any details are given of this
relation.

Conjunction is not mentioned.
However, there is a Joint relation (p76), which I think is too weak
for conjunction: Joint asserts no relation between nuclei, while
Conjunction should assert some relation amongst the nuclei.

Note however that Bill Mann did add Conjunction
to the relation sets for both classical and extended RST.

Mick







Jelisaveta Safranj wrote:
> Dear Chris,
> 
> I have found something in Discourse Tagging Reference Manual written by 
> Lynn Carlson and Daniel Marcu.
> 
> Disjunction is a multinuclear relation whose elements can be listed as 
> alternatives, either positive or negative.
> 
> Examples:
> [Call it a fad.] [Or call it the wave of the future.]
> 
> In the aerobic phase, for instance, lactic acid and lactate are still 
> produced, [but they are consumed by less active muscles] [or metabolized 
> in the liver] and so do not accumulate.
> 
> Conjunction is not mentioned at all.
> 
> Hope it helps
> Jelisaveta
> 
> 
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